Britney Jean looks like it will sell an impressive 115,000 copies in its first 10 days, according to PerezHilton, but it's Garth Brooks' box set Blame It All On My Roots - which includes eight CDs - that is set to nab the number one position on the charts. The Oops I Did It Again songstress also added that Perfume is 'really just about relationship insecurities & feeling insecure about the person you care for the most.' When she asked, 'Can you guess who this song is about?' a fan replied, 'Your ex.' That could have been Jason Trawick or Kevin Federline. At the end of the month Britney will kick off her Las Vegas residency at Planet Hollywood. Many of her new songs from Britney Jean will be a part of the show that promises to be like a party, according to the singer. Last week Britney added several dates to her concert, which is expected to run two years. The former X Factor judge reportedly got a massive $30m payday for her stint. On Saturday the singer looked happy as she grabbed frozen yogurt in Thousand Oaks, California with her boyfriend David Lucado and her sons Sean, aged eight, and Jayden, aged seven. On Monday she shared a photo of a gift from Extra's Mario Lopez - over a dozen cupcakes that spelled out Happy Birthday Britney (she turned 32 on December 2) - and the next day the blonde released her video for Perfume. In it she writhes around on a bed in white lingerie with a handsome Daily Mail